| Parameter |
Value |
| Designation |
C/2010 E5 (Scotti) |
| Type |
C |
| Perihelion (tp_cal, UTC) |
2009-11-21T10:42:02.502720Z |
| Orbit solution date (soln_date, UTC) |
2021-04-15T23:31:41Z |
| Obs used |
121 |
| NEO |
- |
| M1 |
7.300 |
| K1 |
17.000 |
| PC |
0.030 |
Osculating Elements
| Parameter |
Value |
| Epoch (epoch_cal, TDB) |
2010-04-02.0000000 |
| e |
0.84273939 |
| q (au) |
3.888445 |
| a (au) |
24.726120 |
| i (deg) |
18.910164 |
| Ω (om, deg) |
17.083811 |
| ω (w, deg) |
147.858249 |
| M (ma, deg) |
1.054568 |
Magnitude
Scatter + Global Linear
$$
M_a = (17.476 + 2.000\cdot 2.5\log_{10} r) + \epsilon - 2.5\log_{10}\Phi(\theta) + 5\log_{10}\Delta
$$
$$
\theta = 180^\circ - \alpha
$$
$$
\Phi(\theta) = \frac{\delta_{90} D(\theta) + 1}{\delta_{90} + 1},\quad D(\theta) = k\cdot \Phi_{HG}(\theta; g_f) + (1-k)\cdot \Phi_{HG}(\theta; g_b)
$$
$$
\Phi_{HG}(\theta; g) = \left(\frac{1+g^2}{1+g^2-2g\cos\theta}\right)^{3/2},\quad \Phi_{HG}(90^\circ)=1
$$
Model Parameters
| Parameter |
Value |
| H0 |
17.476 |
| n |
2.000 |
| gf |
1.000 |
| gb |
-0.727 |
| k |
0.800 |
| δ90 |
10.000 |
| Parameter |
Symbol |
Range |
Description |
| Absolute magnitude at 1 AU from Sun and Earth |
H0 |
-5 to 20 |
Intrinsic brightness of the comet |
| Photometric slope parameter |
n |
2 to 6 |
Rate of brightness change with heliocentric distance |
| Forward scattering asymmetry factor |
gf |
0.8 to 1 |
Degree of forward scattering |
| Backward scattering asymmetry factor |
gb |
-1 to -0.5 |
Degree of backward scattering |
| Partitioning coefficient |
k |
0.8 to 1 |
Ratio between forward/backward scattering contributions |
| Dust-to-gas brightness ratio |
δ90 |
1 to 10 |
Relative contribution of dust scattering to gas emission |
Reference: EPSC-DPS2025-160
Ephemeris
| Date/Time (UTC) |
RA (J2000) |
Dec (J2000) |
Nearest HIP |
Dist from HIP (arcmin) |
| 2026-05-12 00:00 |
21:49:58.94 |
-30:44:06.4 |
HIP 107608 |
30.55 |
| 2026-05-12 12:00 |
21:49:59.74 |
-30:44:21.1 |
HIP 107608 |
30.63 |
| 2026-05-13 00:00 |
21:50:00.51 |
-30:44:36.1 |
HIP 107608 |
30.71 |
| 2026-05-13 12:00 |
21:50:01.24 |
-30:44:51.2 |
HIP 107608 |
30.79 |
| 2026-05-14 00:00 |
21:50:01.93 |
-30:45:06.6 |
HIP 107608 |
30.85 |
| 2026-05-14 12:00 |
21:50:02.58 |
-30:45:22.1 |
HIP 107608 |
30.91 |
| 2026-05-15 00:00 |
21:50:03.18 |
-30:45:37.8 |
HIP 107608 |
30.97 |
| 2026-05-15 12:00 |
21:50:03.75 |
-30:45:53.8 |
HIP 107608 |
31.01 |
| 2026-05-16 00:00 |
21:50:04.28 |
-30:46:09.9 |
HIP 107608 |
31.05 |
| 2026-05-16 12:00 |
21:50:04.76 |
-30:46:26.2 |
HIP 107608 |
31.09 |
| 2026-05-17 00:00 |
21:50:05.21 |
-30:46:42.6 |
HIP 107608 |
31.12 |
| 2026-05-17 12:00 |
21:50:05.61 |
-30:46:59.3 |
HIP 107608 |
31.14 |
| 2026-05-18 00:00 |
21:50:05.98 |
-30:47:16.2 |
HIP 107608 |
31.15 |
| 2026-05-18 12:00 |
21:50:06.30 |
-30:47:33.2 |
HIP 107608 |
31.16 |
| 2026-05-19 00:00 |
21:50:06.58 |
-30:47:50.4 |
HIP 107608 |
31.16 |
| 2026-05-19 12:00 |
21:50:06.82 |
-30:48:07.8 |
HIP 107608 |
31.16 |
| 2026-05-20 00:00 |
21:50:07.02 |
-30:48:25.4 |
HIP 107608 |
31.14 |
| 2026-05-20 12:00 |
21:50:07.19 |
-30:48:43.1 |
HIP 107608 |
31.13 |
| 2026-05-21 00:00 |
21:50:07.31 |
-30:49:01.1 |
HIP 107608 |
31.10 |
| 2026-05-21 12:00 |
21:50:07.39 |
-30:49:19.2 |
HIP 107608 |
31.07 |
| 2026-05-22 00:00 |
21:50:07.42 |
-30:49:37.4 |
HIP 107608 |
31.04 |
| 2026-05-22 12:00 |
21:50:07.42 |
-30:49:55.9 |
HIP 107608 |
31.00 |
| 2026-05-23 00:00 |
21:50:07.38 |
-30:50:14.5 |
HIP 107608 |
30.95 |
| 2026-05-23 12:00 |
21:50:07.30 |
-30:50:33.2 |
HIP 107608 |
30.89 |
| 2026-05-24 00:00 |
21:50:07.18 |
-30:50:52.2 |
HIP 107608 |
30.83 |
| 2026-05-24 12:00 |
21:50:07.01 |
-30:51:11.3 |
HIP 107608 |
30.77 |
| 2026-05-25 00:00 |
21:50:06.81 |
-30:51:30.5 |
HIP 107608 |
30.70 |
| 2026-05-25 12:00 |
21:50:06.57 |
-30:51:50.0 |
HIP 107608 |
30.62 |
| 2026-05-26 00:00 |
21:50:06.28 |
-30:52:09.5 |
HIP 107608 |
30.54 |
| 2026-05-26 12:00 |
21:50:05.96 |
-30:52:29.3 |
HIP 107608 |
30.45 |
| 2026-05-27 00:00 |
21:50:05.59 |
-30:52:49.2 |
HIP 107608 |
30.36 |
| 2026-05-27 12:00 |
21:50:05.19 |
-30:53:09.2 |
HIP 107608 |
30.26 |
| 2026-05-28 00:00 |
21:50:04.74 |
-30:53:29.4 |
HIP 107608 |
30.16 |
| 2026-05-28 12:00 |
21:50:04.26 |
-30:53:49.8 |
HIP 107608 |
30.05 |
| 2026-05-29 00:00 |
21:50:03.74 |
-30:54:10.3 |
HIP 107608 |
29.94 |
| 2026-05-29 12:00 |
21:50:03.17 |
-30:54:30.9 |
HIP 107608 |
29.82 |
| 2026-05-30 00:00 |
21:50:02.57 |
-30:54:51.7 |
HIP 107608 |
29.70 |
| 2026-05-30 12:00 |
21:50:01.92 |
-30:55:12.6 |
HIP 107608 |
29.58 |
| 2026-05-31 00:00 |
21:50:01.24 |
-30:55:33.7 |
HIP 107608 |
29.45 |
| 2026-05-31 12:00 |
21:50:00.51 |
-30:55:54.9 |
HIP 107608 |
29.31 |
| 2026-06-01 00:00 |
21:49:59.75 |
-30:56:16.2 |
HIP 107608 |
29.17 |
| 2026-06-01 12:00 |
21:49:58.95 |
-30:56:37.7 |
HIP 107608 |
29.03 |
| 2026-06-02 00:00 |
21:49:58.11 |
-30:56:59.3 |
HIP 107608 |
28.89 |